Single-voltage supervisor with AEC-Q100 Grade 1 temperature range
The MAX6381XR28D2+ is a single-voltage power-supply monitor from Analog Devices, designed to assert a reset signal to a microprocessor, FPGA, or ASIC when the monitored supply rail drops below a 2.8V threshold. The reset output is active-low, push-pull, and totem-pole — no external pull-up resistor is needed on the output pin, which saves a component and a board trace in tight layouts.
2.8V threshold and 20 ms reset timeout for glitch rejection
The 2.8V threshold monitors a single supply rail — a common choice for supervising a 3.3V or 3.0V core supply, asserting reset before the rail drops below the processor's minimum operating voltage. The minimum reset timeout of 20 ms filters out short supply transients that could otherwise cause false resets — a 20 ms window is long enough to ride through a load-step dip on a properly decoupled rail but short enough to hold the system in reset through a brown-out event. Monitors exactly one voltage, so the BOM carries one supervisor per supervised rail; a multi-rail system uses multiple instances of this part or a multi-channel supervisor.
SC-70-3 package for space-constrained boards
Surface-mount assembly with the standard SC-70 land pattern — no thermal pad or exposed paddle, so the solder profile follows the standard JEDEC reflow for small-outline packages.